Ex vivo evaluation of coronal marginal microleakage of temporary restoratives used in endodontics

Abstract

The aim of this study was to evaluate ex vivo the coronal microleakage of temporary restorative materials used in endodontics. Forty six human single root canine teeth, obtained from the FORP-USP Teeth Bank, were used. The procedure was initialized by preparing the endodontic accesses and chemomechanical materials. A cone shaped absorbent paper was inserted in the root canal and a cotton pellet embedded with a solution of 1% dimetylglyoxime was introduced in the pulp chamber. The specimens were restored with the materials as per each manufacturer’s instructions and then separated in the following groups: G1 - Vidrion RTM; G2 – Cavit WTM; G3 - VillevieTM; G4 - BioplicTM; positive control - did not receive any type of temporary material; and negative control - restored with Cavit WTM and then made completely impermeable by two layers of nail polish. All specimens were immersed in a 5% nickel sulfate solution and then submitted to thermo cycling for 72h. The samples were put through the Kruskal-Wallis test, which showed that the temporary materials VillevieTM and BioplicTM had the least microleakage, followed by CavitTM W and by Vidrion RTM. It could be concluded that even though VillevieTM and BioplicTM suffered less infiltration, none of the tested materials prevented coronal microleakage.